Singles and couples gather in this moody sushi bar before, after or instead of going to its nearby relative, Zenbu.. In Short In the same complex as lively Zenbu, Koi was originally designed as spillover space. The two restaurants still share a menu, but Koi has its own personality. The long, narrow space
is dark and sparsely decorated, except for several gilded mirrors lining one wall and a bright koi mural on the opposite. With DJ-spun electronica pulsing in the background, well-dressed patrons sip specialty cocktails and nibble sushi rolls crafted by the chef behind the counter.…